Remove unnecessary parens on return.

This is a mechanical change generated from the following command:

find crypto/{asn1,pem,x509,x509v3} -name '*.c' -o -name '*.h' | xargs sed -i -e 's/return (\([^;()]*\));/return \1;/'

Change-Id: I957295af96c4aa08d6006e27093fd3a07fb6fe75
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/53089
Reviewed-by: Bob Beck <bbe@google.com>
Commit-Queue: Bob Beck <bbe@google.com>
diff --git a/crypto/asn1/a_utctm.c b/crypto/asn1/a_utctm.c
index c0cc2f9..159a0ea 100644
--- a/crypto/asn1/a_utctm.c
+++ b/crypto/asn1/a_utctm.c
@@ -93,9 +93,9 @@
       }
       s->type = V_ASN1_UTCTIME;
     }
-    return (1);
+    return 1;
   } else {
-    return (0);
+    return 0;
   }
 }
 
@@ -152,7 +152,7 @@
                ts->tm_sec);
   s->length = strlen(p);
   s->type = V_ASN1_UTCTIME;
-  return (s);
+  return s;
 err:
   if (free_s && s) {
     ASN1_UTCTIME_free(s);